Submission #387564

#	Time	Username	Problem	Language	Result	Execution time	Memory
387564		Kevin_Zhang_TW	Trampoline (info1cup20_trampoline)	C++17	100 / 100	383 ms	29384 KiB

trampoline

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a && (a = b, true); }
template<class T> bool chmax(T &a, T b) { return a < b && (a = b, true); }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
template<class T> void debug(T l, T r) { while (l != r) cerr << *l << " \n"[next(l)==r], ++l; }
#else
#define DE(...) 0
#define debug(...) 0
#endif

const int MAX_N = 200010, MAX_K = 19;

int R, C, n;

int nxt[MAX_K][MAX_N];

pair<int,int> a[MAX_N];

int32_t main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	cin >> R >> C >> n;
	for (int x, y, i = 0;i < n;++i) {
		cin >> x >> y;
		a[i] = {x, y};
	}
	sort(a, a+n);

	// init

	for (int i = n-1, j = n-1;i >= 0;--i) {
		auto [x, y] = a[i];

		while (j > 0 && a[j-1] >= make_pair(x+1, y))
			--j;

		auto [nx, ny] = a[j];

		if (nx == x+1 && ny >= y)
			nxt[0][i] = j;
		else
			nxt[0][i] = n;

		DE(x, y, nx, ny);
	}

	nxt[0][n] = n;

	for (int d = 1;d < MAX_K;++d)
		for (int i = 0;i <= n;++i) 
			nxt[d][i] = nxt[d-1][ nxt[d-1][i] ];

	int Q;
	cin >> Q;

	for (int x1, y1, x2, y2, i = 0;i < Q;++i) {
		cin >> x1 >> y1 >> x2 >> y2;

		int ind = lower_bound(a, a+n, make_pair(x1, y1)) - a;

		auto [x, y] = a[ind];

		DE(x1, y1, x, y, x2, y2);

		if (x1 > x2 || y1 > y2) {
			cout << "No\n";
			continue;
		}

		if (x1 == x2) {
			cout << "Yes\n";
			continue;
		}

		if (ind == n || x != x1) {
			cout << "No\n";
			continue;
		}

		int d = x2 - x1 - 1;

		for (int j = 0;j < MAX_K;++j)
			if (d>>j&1) ind = nxt[j][ind];

		tie(x, y) = a[ind];

		DE(x, y);

		if (ind == n || y > y2) {
			cout << "No\n";
		}
		else {
			assert(x == x2 - 1);
			cout << "Yes\n";
		}
	}

}

Compilation message (stderr)

trampoline.cpp: In function 'int32_t main()':
trampoline.cpp:14:17: warning: statement has no effect [-Wunused-value]
   14 | #define DE(...) 0
      |                 ^
trampoline.cpp:50:3: note: in expansion of macro 'DE'
   50 |   DE(x, y, nx, ny);
      |   ^~
trampoline.cpp:14:17: warning: statement has no effect [-Wunused-value]
   14 | #define DE(...) 0
      |                 ^
trampoline.cpp:69:3: note: in expansion of macro 'DE'
   69 |   DE(x1, y1, x, y, x2, y2);
      |   ^~
trampoline.cpp:14:17: warning: statement has no effect [-Wunused-value]
   14 | #define DE(...) 0
      |                 ^
trampoline.cpp:93:3: note: in expansion of macro 'DE'
   93 |   DE(x, y);
      |   ^~

• Subtask 1: 23 / 23
• Subtask 2: 20 / 20
• Subtask 3: 11 / 11
• Subtask 4: 19 / 19
• Subtask 5: 27 / 27